So, you can go to the Chinese Visa Application Center (1st Floor, Commercial Tower, Le Meridian Hotel). you need to prepare all the documents as follows;
1. Application form.
2. Applicant's passport valid for at least six months with at least 2 blank visa pages.
3. One recent passport size photograph.
4. One Passport photocopy.
5. Visa notification letter from relevant authorities in China, namely, Ministries and Commissions of the State Council, the Government of all Provinces, Autonomous Regions, and Municipalities directly under the Central Government, and Foreign Affairs Offices and Bureaus of Economy and Commerce thereunder, and departments and units recognized by the Department of Consular Affairs of the Ministry of Foreign Affairs of the People’s Republic of China.
6. Covering letter from applicant's company or employer addressed to visa office.